Which of these digital modes has the highest data throughput under clear communication conditions?
The correct answer is D: PACTOR IV. Which of these digital modes has the highest data throughput under clear communication conditions is PACTOR IV. PACTOR IV has the highest data rate among these modes. For amateur radio operators, this is important for high-speed data communication. Understanding this helps when selecting digital modes.
Exam Tip
Highest data throughput digital mode = PACTOR IV. Think 'P'ACTOR 'I'V = 'P'eak 'I'nput 'V'elocity (highest speed). PACTOR IV has the highest data rate among these modes. Not MFSK16, not RTTY, not FT8 - just PACTOR IV.
Memory Aid
"Highest data throughput digital mode = PACTOR IV. Think 'P'ACTOR 'I'V = 'H'ighest 'S'peed. PACTOR IV has the highest data rate among these modes. Important for high-speed data communication."
Real-World Application
Digital mode data throughput: PACTOR IV has the highest data throughput under clear conditions (up to several thousand bits per second). MFSK16, RTTY, and FT8 all have lower data rates. PACTOR IV is designed for high-speed data transfer. This is the mode - PACTOR IV has the highest data throughput.
Key Concepts
Why Other Options Are Wrong
Option A (MFSK16): Incorrect. MFSK16 has lower throughput than PACTOR IV - PACTOR IV is faster. MFSK16 isn't the highest.
Option B (170 Hz shift, 45 baud RTTY): Incorrect. RTTY has lower throughput than PACTOR IV - PACTOR IV is faster. RTTY isn't the highest.
Option C (FT8): Incorrect. FT8 has lower throughput than PACTOR IV - PACTOR IV is faster. FT8 isn't the highest.
题目解析
The correct answer is D: PACTOR IV. Which of these digital modes has the highest data throughput under clear communication conditions is PACTOR IV. PACTOR IV has the highest data rate among these modes. For amateur radio operators, this is important for high-speed data communication. Understanding this helps when selecting digital modes.
考试技巧
Highest data throughput digital mode = PACTOR IV. Think 'P'ACTOR 'I'V = 'P'eak 'I'nput 'V'elocity (highest speed). PACTOR IV has the highest data rate among these modes. Not MFSK16, not RTTY, not FT8 - just PACTOR IV.
记忆口诀
Highest data throughput digital mode = PACTOR IV. Think 'P'ACTOR 'I'V = 'H'ighest 'S'peed. PACTOR IV has the highest data rate among these modes. Important for high-speed data communication.
实际应用示例
Digital mode data throughput: PACTOR IV has the highest data throughput under clear conditions (up to several thousand bits per second). MFSK16, RTTY, and FT8 all have lower data rates. PACTOR IV is designed for high-speed data transfer. This is the mode - PACTOR IV has the highest data throughput.
错误选项分析
Option A (MFSK16): Incorrect. MFSK16 has lower throughput than PACTOR IV - PACTOR IV is faster. MFSK16 isn't the highest. Option B (170 Hz shift, 45 baud RTTY): Incorrect. RTTY has lower throughput than PACTOR IV - PACTOR IV is faster. RTTY isn't the highest. Option C (FT8): Incorrect. FT8 has lower throughput than PACTOR IV - PACTOR IV is faster. FT8 isn't the highest.
知识点
Digital modes, Highest data throughput, PACTOR IV, Data rate
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.